Gemini 2.5 Flash is Google's workhorse reasoning model, designed for fast, high-quality responses across coding, mathematics, and scientific tasks. It features built-in "thinking" capabilities with configurable thinking levels, allowing it to balance response speed and reasoning depth based on task complexity. Supporting a 1M-token context window with multimodal inputs including text, images, audio, video, and PDFs, it delivers strong performance at a fraction of the cost and latency of larger Gemini Pro models.